/*
 * Universally Unique IDentifier (UUID)
 * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */
#include "utils/includes.h"
#include "utils/common.h"
#include "utils/uuid.h"

int uuid_str2bin(const char* str, u8* bin)
{
    const char* pos;
    u8* opos;

    pos = str;
    opos = bin;

    if (hexstr2bin(pos, opos, 4)) {
        return -1;
    }

    pos += 8;
    opos += 4;

    if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) {
        return -1;
    }

    pos += 4;
    opos += 2;

    if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) {
        return -1;
    }

    pos += 4;
    opos += 2;

    if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) {
        return -1;
    }

    pos += 4;
    opos += 2;

    if (*pos++ != '-' || hexstr2bin(pos, opos, 6)) {
        return -1;
    }

    return 0;
}


int uuid_bin2str(const u8* bin, char* str, size_t max_len)
{
    int len;
    len = snprintf(str, max_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
                   "%02x%02x-%02x%02x%02x%02x%02x%02x",
                   bin[0], bin[1], bin[2], bin[3],
                   bin[4], bin[5], bin[6], bin[7],
                   bin[8], bin[9], bin[10], bin[11],
                   bin[12], bin[13], bin[14], bin[15]);

    if (len < 0 || (size_t) len >= max_len) {
        return -1;
    }

    return 0;
}


int is_nil_uuid(const u8* uuid)
{
    int i;

    for (i = 0; i < UUID_LEN; i++)
        if (uuid[i]) {
            return 0;
        }

    return 1;
}
